780978611 has 12 divisors (see below), whose sum is σ = 913570920. Its totient is φ = 665663040.

The previous prime is 780978607. The next prime is 780978617. The reversal of 780978611 is 116879087.

It is not a de Polignac number, because 780978611 - 2² = 780978607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (780978617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35750 + ... + 53291.

It is an arithmetic number, because the mean of its divisors is an integer number (76130910).

Almost surely, 2^780978611 is an apocalyptic number.

780978611 is a deficient number, since it is larger than the sum of its proper divisors (132592309).

780978611 is a wasteful number, since it uses less digits than its factorization.

780978611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89234 (or 89227 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 47.

The square root of 780978611 is about 27945.9945430468. The cubic root of 780978611 is about 920.9012163756.

The spelling of 780978611 in words is "seven hundred eighty million, nine hundred seventy-eight thousand, six hundred eleven".